Sylvania



(No Model.)

W. A. LORENZ.

PROCESS OF MAKING GRBASES IN SHEETS OP FLEXIBLBOR ELASTIC MATERIAL.

Patented Apr. 3, 1888.

I 2 x 1 W//// 8 1 Witnesses.-

' UNITED STATES PATENT @FFTCE WILLIAM A. LORENZ, OF HARTFORD, CONNECTICUT, ASSIGNOR TO FELIX W. LEINBACH AND CLARENCE A. VVOLLE, BOTH OF BETHLEHEM, PENN- SYLVANIA.

PROCESS OF MAKiNG CREASES lN SHEETS F FLEXIBLE OR ELASTlC MATERIAL.

SPECIFICATION forming part of Letters Patent No. 380,397, dated April 3, 1888.

Application filed February 21. 1887. Serial No. 228.425. (N0 model.)

To aZZ whom it may concern:

, Be it known that 1, WILLIAM A. LORENZ, of Hartford, Connecticut, haveinvented anew and useful process of making opposite and oppositely-extending creases in double sheets of flexible and non-elastic or slightly elastic material, of which the following description and claim constitute the specification, and which is illustrated in the accompanying sheet of drawings.

Figure l is a plan View of a double sheet of paper. Fig. 2 is a view of the lower edge of what is shown in Fig. 1 before the sheet is creased, while Fig. 3 is a like view of that sheet after the opposite and oppositely-extending creases have been made in the same. Fig. 4 is a plan view of the sheet of Fig. 1 grasped and held by two pairs of grippers preparatory to making the creases, while Fig. 5 is a longitudinal section on the line a b of Fig. 4; and Fig. 6 is a View of what is shown in Fig. 5 after the two pairs of grippers have been forced together, so as to make the creases.

The numeral 1 indicates'thelower thickness of the sheet of paper, while the upper thickness thereof is denoted by the numeral 2. The dotted line 3 and 4 indicates the transverse line upon which the creases5aud 6 are made. The grippers 7 and 8 are held together in any proper manner, so as to grasp the sheet be-- tweenthem to the right of the line 3 and 4, while the grippers 9 and 10 are likewise held together on theleft of that line. The meeting corners of all the grippers are chamfered, as shown in Figs. 5 and 6, and the working-surfaces of both pairs of those grippers occupy the same plane.

The process of making the two opposing and oppositelyextending creases 5 and 6 consists in grasping the double sheet with the two pairs of grippers, and in forcing them together in the direction of the common plane of their working-surfaces. This operation causes the upper thickness of the double sheet to buckle upward and the lower thickness thereof to buckle downward, and thus produces'the opposite and oppositely-extending creases 5 and 6. This process of making creascs'is applicable to double sheets of paper, leather, fabric, metal, and other flexible and non-elastic substances, and it is particularly useful in cases where for any reason such sheets cannot be properly creased by being passed between rollers, or by the application of creasing implements to those sides of the sheets which are to have the coucaved sides of the creases.

-I do not herein claim the described mechanism or any mechanism to be used in the performances of my process, because that process may be slowly performed with hand-tools, and because it is proposed to make a separate application for a patent on a machine for performing it rapidly.

.I claim as my invention- Theprocess of making two opposite and 0p- 6 positely extending creases in two adjacent thicknesses of flexible material,which consists in forcing that portion of the two thicknesses which is on one side of the line ot'the desired creases toward that portion which is on the other side of that line, and along the common plane occupied by those two thicknesses, all substantially as described.

Dated February 8, 1887.

"WILLIAM A. LORENZ.

\Vitnesses:

ALBERT H. WALKER, CLARENCE E. BUOKLAND. 

